/*
 * Copyright (C) 2022 xuexiangjys(xuexiangjys@163.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package cn.kcrx.autoweightapp.data

import android.content.Context
import androidx.room.Database
import androidx.room.Room
import androidx.room.RoomDatabase
import androidx.room.TypeConverters
import androidx.sqlite.db.SupportSQLiteDatabase

@Database(entities = [NewCashBoxRecord::class], version = 1)
@TypeConverters(Converters::class)
abstract class AppDatabase: RoomDatabase()  {
  abstract fun newCashBoxRecordDao():NewCashBoxRecordDao

  companion object {

    // For Singleton instantiation
    @Volatile private var instance: AppDatabase? = null

    fun getInstance(context: Context): AppDatabase {
      return instance ?: synchronized(this) {
        instance ?: buildDatabase(context).also { instance = it }
      }
    }

    // Create and pre-populate the database. See this article for more details:
    // https://medium.com/google-developers/7-pro-tips-for-room-fbadea4bfbd1#4785
    private fun buildDatabase(context: Context): AppDatabase {
      return Room.databaseBuilder(context, AppDatabase::class.java, "autoweight-db")
        .build()
    }
  }
}